CN104836334A - Low voltage microgrid group independent coordination control system - Google Patents
Low voltage microgrid group independent coordination control system Download PDFInfo
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
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- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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Abstract
Provided is a low voltage microgrid group independent coordination control system, employing a layered control structure, i.e., an equipment layer, a grid control layer and a group control layer. A microgrid group controller receives a scheduling instruction of a group level energy management system; based on the safety and reliability of a control target of the microgrid group and sub microgrids, the microgrid group controller controls exchanging power between a microgrid group and a power distribution network and each sub microgrid, grid disconnection or grid connection of the microgrid group, and grid connection or grid disconnection of the sub microgrids, realizes interface control between the sub microgrids and the microgrid group, and meanwhile issues a control instruction to a grid level controller. The grid level controller works out optimal control strategies of distributed power supply, energy storage and load, and realizes stable operation and smooth transition among states of the sub microgrids in a grid connection state, and information communication with the microgrid group controller. A supply or energy storage local controller completes primary regulation of frequency and voltage of distributed power supply and energy storage; a load controller completes load grading control.
Description
Technical field
The present invention relates to micro-capacitance sensor group in renewable energy power generation field to run and control field, the autonomous and coordinated control system of especially a kind of low pressure micro-capacitance sensor group.
Background technology
The appearance of micro-capacitance sensor fundamentally changes the mode of tradition reply load growth, and from the angle of system, micro-capacitance sensor can expand power system capacity neatly as controllable, and the reliability of available redundancy raising system in parallel, has high system maintainability.But because China's electrical network exists the problems such as extensive regenerative resource digestion capability is not enough, distribution link relative thin is weak, the interactive level of electricity consumption is lower, and electric automobile and energy storage technology development urgent demand is existed to intelligent power grid technology, thus propose the concept of micro-capacitance sensor group, micro-capacitance sensor group is the product that micro-capacitance sensor develops into certain phase.Micro-capacitance sensor group is not equal to the micro-capacitance sensor that a capacity is larger, element is more, wider, the component units of micro-capacitance sensor group is micro-capacitance sensor, each sub-micro-capacitance sensor except having except common operational objective under group's pattern, and in other situation, they may have the operational objective of oneself.
The research in this field is mainly for the cooperation control of micro-capacitance sensor at present, mutually coordinates, reasonable load sharing power to the distributed power source in micro-capacitance sensor.As a kind of coordination control method for micro-grid system, a kind of multistage grid control method based on four-dimensional energy management space, a kind of micro-capacitance sensor distributed power source hierarchical coordinative control system and method, a kind of micro electric network coordination controller based on points of common connection platform, be applicable to the frequency hierarchical coordinative control method containing the isolated micro-capacitance sensor of bavin storage, the multi-agent optimized coordination control method etc. of electrical network, its control model mainly contains centralized control, master & slave control, the modes such as equity control and hierarchical control, but fail to utilize distributed resource in other micro-capacitance sensor when it runs, without in major network support situation, the stability of micro-grid system and reliability are all not high, how under net condition, make each independent micro-capacitance sensor can networking operation by design common objective, realize energy to help mutually, many microgrids power-balance there is no effective ways and solves.
The single micro-capacitance sensor of tradition only from network operation and the two kinds of modes that are incorporated into the power networks, cannot utilize the distributed resource in other micro-capacitance sensor, fail to realize the maximum using of regenerative resource and the power supply reliability of maximized guaranteed load fully during operation.Micro-capacitance sensor group energy enough makes full use of respective characteristic and realizes having complementary advantages, micro-capacitance sensor group is compared with micro-capacitance sensor, component units is different, and then cause the difference of operational objective level and control structure, micro-capacitance sensor group energy enough makes full use of the distributed and coordinated control that self-character solves micro-capacitance sensor, can not only distributed energy be made full use of, the stable operation of system can be ensured simultaneously.Therefore, to power distribution network containing the mutual support of multiple micro-capacitance sensor and coordinated operation problem, the Harmonic Control of micro-capacitance sensor group needed badly and launches research.
Summary of the invention
(1) technical problem that will solve
Autonomous and the coordinated control system of a kind of low pressure micro-capacitance sensor group proposed by the invention.Each sub-micro-capacitance sensor except having except common operational objective under group's pattern, in other situations, they can have the operational objective of oneself, the task of having disperseed operational management to control and risk, wider resource consolidation can be realized while satisfied difference sub-micro-capacitance sensor operational objective, give play to larger value, better achieve the optimizing operation of each sub-micro-capacitance sensor.Help mutually at the inner energy that can realize to a certain degree of micro-capacitance sensor group, while improve distributed energy utilance, the electric energy of high-quality more can be provided for load.
Operational mode, every sub-micro-capacitance sensor also to a certain degree can take off group and run, whole micro-capacitance sensor faciation for power distribution network can grid-connected, from net or part be incorporated into the power networks, achieve the variation of operational mode, improve the ability to accept of electric power system to distributed energy.Present invention achieves the hierarchical control of micro-capacitance sensor group, improve reliability, the utilance of regenerative resource and the ability of system security reliability and the various situation of reply that load is powered.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides the autonomous coherent system of a kind of low pressure micro-capacitance sensor group, the autonomous coherent system of described low pressure micro-capacitance sensor group comprises: load governor, wind control device, photovoltaic controller, energy storage controller, sub-micro-capacitance sensor controller, micro-capacitance sensor group controller; Described low pressure micro-capacitance sensor is mined massively by three layers of control structure, i.e. team control layer, network control layer and mechanical floor; Described network control layer and described team control layer adopt double-network redundant ethernet communication network; Described sub-micro-capacitance sensor controller described load governor, described wind control device, described photovoltaic controller, described energy storage controller on the basis of master control Primary regulation as Secondary Control; Micro-capacitance sensor group controller regulates as three times on the basis of master control at sub-micro-capacitance sensor, sends control command to micro-capacitance sensor controller.
Preferably, described low pressure micro-capacitance sensor group adopts team control layer, network control layer and mechanical floor specifically describe as follows:
(1) described team control layer, micro-capacitance sensor group controller receives the Optimized Operation plan that group EMS is issued, the function possessing micro-capacitance sensor group level cooperation control comprise control exchange power between micro-capacitance sensor group and power distribution network and each sub-micro-capacitance sensor, realize micro-capacitance sensor group from net or be incorporated into the power networks, the adjustment from cutting-in control and benchmark job point of sub-micro-capacitance sensor; Described team control layer divides according to micro-capacitance sensor group and the connection status of the connection status of power distribution network points of common connection, sub-micro-capacitance sensor and micro-capacitance sensor group points of common connection, sub-micro-capacitance sensor adjustability and the sub-micro-capacitance sensor running status of priority to micro-capacitance sensor group of exerting oneself; When group is incorporated into the power networks, power output controls by power distribution network, and in group, micro-capacitance sensor works in power control mode; When group is from network operation, if sub-micro-capacitance sensor stored energy capacitance ratio is between 0.5 to 2 in group, then in group, sub-micro-capacitance sensor adopts equity to control, otherwise using micro-capacitance sensor in the maximum group of stored energy capacitance as main control unit, adopts power control mode in other group from sub-micro-capacitance sensor; Micro-capacitance sensor adjustability is a charge value relevant with the duration, described charge value is made after assessing self-ability by sub-micro-capacitance sensor and described charge value is issued group controller, described charge value considers to meet after self needs and micro-capacitance sensor deal with the nargin of emergency situations, the ability support externally provided, described group controller determines according to described charge value the power limit that sub-micro-capacitance sensor externally shows;
(2) described network control layer, sub-micro-capacitance sensor controller receives the Optimized Operation plan that Home Network level EMS is issued, receive the control command of micro-capacitance sensor group controller, the running status according to sub-micro-capacitance sensor and the connection status of micro-capacitance sensor group points of common connection and the state-of-charge antithetical phrase micro-capacitance sensor of energy storage divides simultaneously; The reference power point of micro-capacitance sensor controller dynamic adjustments mechanical floor unit realizes micro-capacitance sensor and controls; When micro-grid connection is run, mode of operation is controlled by group controller; During from network operation, generating is less than with under electricity condition, and the intermittent distributed power source of wind-force or photovoltaic adopts maximum power control, energy-storage units provide send out, electricity consumption imbalance power, the Primary regulation of system is the droop control of energy storage unit; Secondary Control is realized by the reference power point changing energy-storage units; Generating is greater than with under electricity condition, and intermittent distributed power source adopts inverse dip control mode, and energy-storage units adopts droop control mode; Energy storage and distributed power source participate in Primary regulation jointly; When the voltage fluctuation produced because of power fluctuation is out-of-limit, Secondary Control is realized by the inverse dip coefficient of the reference power point and intermittent distributed power source that change energy-storage units; Adopt the control mode being main control unit with micro-capacitance sensor controller;
(3) mechanical floor described in, energy-storage units, when being incorporated into the power networks, adopts current control method, is followed the tracks of frequency and the phase place of line voltage by phase-locked loop; In network operation situation, adopt voltage-frequency to control at micro-capacitance sensor, such as distribution network failure and cause micro-capacitance sensor from network operation, set up and maintain voltage and the frequency of micro-capacitance sensor, automatically receiving instantaneous imbalance power in system to stabilize the fluctuation of voltage and frequency.
Preferably, for the transient state control method that micro-capacitance sensor group takes from net situation:
1) out-of-limit primarily of busbar voltage, the sub-micro-capacitance sensor error protection of micro-capacitance sensor group islanding control exits, sub-micro-capacitance sensor internal fault is bypassed the immediate leadership, from event triggerings such as net impact load inputs; When sub-micro-capacitance sensor internal fault or impact load drop into, initiatively disconnect with micro-capacitance sensor group, prevent other sub-micro-capacitance sensor malfunctions; As fruit micro-capacitance sensor internal fault is bypassed the immediate leadership, other sub-micro-capacitance sensor are disconnected by micro-capacitance sensor group controller; When group is out-of-limit from net busbar voltage, each sub-micro-capacitance sensor disconnects, and avoids mutual interference;
2) in micro-capacitance sensor group starting process, start time storage micro-capacitance sensor and first connect with similar micro-capacitance sensor, connect synchronous with wind-light storage micro-capacitance sensor afterwards; In running, first synchronous when being incorporated to sub-micro-capacitance sensor, connection of closing a floodgate afterwards; Micro-capacitance sensor group is incorporated to power distribution network time storage micro-capacitance sensor and wind-light storage micro-capacitance sensor is incorporated to micro-capacitance sensor successively, to reduce the impact to power distribution network, and not active synchronization each other;
3) micro-capacitance sensor group is grid-connected leaves net, when distribution or micro-capacitance sensor flock-mate stream busbar voltage are discontented with the requirement of pedal system, then transfers to from net pattern; When carrying out that micro-capacitance sensor group is grid-connected leaves net, micro-capacitance sensor group points of common connection switching protective device control switch disconnects power distribution network, and is control mode by antithetical phrase micro-capacitance sensor setting power control mode or voltage-frequency under micro-capacitance sensor group principal and subordinate or reciprocity control model;
4) micro-capacitance sensor group turns grid-connected from net, after distribution network restoration is powered, detected frequency, amplitude, the phase place of points of common connection both sides voltage by micro-capacitance sensor group points of common connection switching protective device and micro-capacitance sensor group tuning controller, if meet synchronous requirement, drop into micro-capacitance sensor group points of common connection switch; Or transfer to from net pattern according to system requirements by sub-micro-capacitance sensor, control to drop into micro-capacitance sensor group points of common connection switch, each sub-micro-capacitance sensor is synchronous with power distribution network grid-connected by energy storage adjustment under voltage-frequency control model, and proceeds to grid-connect mode simultaneously.
(3) beneficial effect
Autonomous and the coordinated control system of a kind of low pressure micro-capacitance sensor group proposed by the invention and method, the task of having disperseed operational management to control and risk, wider resource consolidation can be realized while satisfied difference sub-micro-capacitance sensor operational objective, better achieve the optimizing operation of each sub-micro-capacitance sensor.The energy realized to a certain degree in micro-capacitance sensor group inside helps, mutually while improve distributed energy utilance, for load provides the electric energy of high-quality more.Operational mode, achieve the variation of operational mode, improve the ability to accept of electric power system to distributed energy.
The present invention is mainly applicable to the controlling run of micro-capacitance sensor group, realize many micro-capacitance sensor mutual support and to the support of many micro-capacitance sensor to power distribution network, realize the maximum using of regenerative resource and the power supply reliability of maximized guaranteed load.There is broad prospect of application.The present invention has high stability, can realize energy helps mutually, and the feature of autonomous and cooperation control, can produce considerable economic benefit and good social benefit.Apply safety that this invention can the improve electric power system power supply reliability by stability and power consumer, improve user's efficiency and also reduce carbon dioxide and noxious gas emission, make clean energy resource be able to maximized utilization.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the micro-capacitance sensor team control flow chart of an embodiment according to the autonomous of a kind of low pressure micro-capacitance sensor of the present invention group and coordinated control system and using method thereof;
Fig. 2 is the micro-capacitance sensor group cooperation control schematic diagram of an embodiment according to the autonomous of a kind of low pressure micro-capacitance sensor of the present invention group and coordinated control system and using method thereof.
Embodiment
Below in conjunction with Figure of description and embodiment, the specific embodiment of the present invention is described in further detail.Following examples only for illustration of the present invention, but can not be used for limiting the scope of the invention.
Low pressure micro-capacitance sensor group is autonomous comprises load governor, wind control device, photovoltaic controller, energy storage controller, sub-micro-capacitance sensor controller, micro-capacitance sensor group controller with coherent system, network control layer and team control layer employing double-network redundant ethernet communication network.
Micro-capacitance sensor is mined massively by three layers of control structure, i.e. mechanical floor, network control layer and team control layer, and this tactic pattern is introduced communication system but not exclusively relied on it, continues to maintain micro-capacitance sensor stable operation when communication failure with the control of low one deck in support.
(1) team control layer
Micro-capacitance sensor group controller receives the Optimized Operation plan that group EMS is issued, the function possessing micro-capacitance sensor group level cooperation control comprise control exchange power between micro-capacitance sensor group and power distribution network and each sub-micro-capacitance sensor, realize micro-capacitance sensor group from net or be incorporated into the power networks, the adjustment from cutting-in control and benchmark job point of sub-micro-capacitance sensor; Described team control layer divides according to micro-capacitance sensor group and the connection status of the connection status of power distribution network points of common connection, sub-micro-capacitance sensor and micro-capacitance sensor group points of common connection, sub-micro-capacitance sensor adjustability and the sub-micro-capacitance sensor running status of priority to micro-capacitance sensor group of exerting oneself; When group is incorporated into the power networks, power output controls by power distribution network, and in group, micro-capacitance sensor works in power control mode; When group is from network operation, if sub-micro-capacitance sensor stored energy capacitance ratio is between 0.5 to 2 in group, then in group, sub-micro-capacitance sensor adopts equity to control, otherwise using micro-capacitance sensor in the maximum group of stored energy capacitance as main control unit, adopts power control mode in other group from sub-micro-capacitance sensor; Micro-capacitance sensor adjustability is a charge value relevant with the duration, described charge value is made after assessing self-ability by sub-micro-capacitance sensor and described charge value is issued group controller, described charge value considers to meet after self needs and micro-capacitance sensor deal with the nargin of emergency situations, the ability support externally provided, described group controller determines according to described charge value the power limit that sub-micro-capacitance sensor externally shows; Micro-capacitance sensor group controller regulates as upper level on the basis of master control at micro-capacitance sensor, control command is sent to micro-capacitance sensor controller, the security and stability maintaining micro-capacitance sensor runs, and realizes power dynamic equilibrium, and then realizes unattended operation and the web transporting function of micro-capacitance sensor group.
(2) network control layer
Sub-micro-capacitance sensor controller receives the Optimized Operation plan that Home Network level EMS is issued, receive the control command of micro-capacitance sensor group controller, the running status according to sub-micro-capacitance sensor and the connection status of micro-capacitance sensor group points of common connection and the state-of-charge antithetical phrase micro-capacitance sensor of energy storage divides simultaneously; The reference power point of micro-capacitance sensor controller dynamic adjustments mechanical floor unit realizes micro-capacitance sensor and controls; When micro-grid connection is run, mode of operation is controlled by group controller.During from network operation, generating is less than with under electricity condition, and the intermittent distributed power source of wind-force or photovoltaic adopts maximum power control, energy-storage units provide send out, electricity consumption imbalance power, the Primary regulation of system is the droop control of energy storage unit; Secondary Control is realized by the reference power point changing energy-storage units; Generating is greater than with under electricity condition, and intermittent distributed power source adopts inverse dip control mode, and energy-storage units adopts droop control mode; Energy storage and distributed power source participate in Primary regulation jointly; When the voltage fluctuation produced because of power fluctuation is out-of-limit, Secondary Control is realized by the inverse dip coefficient of the reference power point and intermittent distributed power source that change energy-storage units; Adopt the control mode being main control unit with micro-capacitance sensor controller;
(3) mechanical floor
Energy-storage units, when being incorporated into the power networks, adopts current control method, is followed the tracks of frequency and the phase place of line voltage by phase-locked loop; In network operation situation, adopt voltage-frequency to control at micro-capacitance sensor, such as distribution network failure and cause micro-capacitance sensor from network operation, set up and maintain voltage and the frequency of micro-capacitance sensor, automatically receiving instantaneous imbalance power in system to stabilize the fluctuation of voltage and frequency;
Photovoltaic, wind power generation unit are to adopt maximum power control pattern, and with maximum power to electrical network active power of output, power factor is 1.0.When the power that micro-capacitance sensor can not receive interval power supply to send, need suitably to reduce the power that this generator unit is input to micro-capacitance sensor.
In order to the power-on time of guaranteed load, load is by the switching of energy storage charge state Hysteresis control load.
Below the algorithm of master-slave control mode and reciprocity control model is described in detail.
1) master-slave control mode algorithm
In micro-capacitance sensor group, boss's micro-capacitance sensor externally runs on voltage-frequency pattern, and the set point of its voltage, frequency is determined by micro-capacitance sensor group controller, determines that the value and power reference that it exports is as follows from sub-micro-capacitance sensor according to busbar voltage, frequency:
k
pi, k
qibe respectively that micro-capacitance sensor group controller sets the voltage reference value of i-th sub-micro-capacitance sensor, frequency reference value setting, the setting of active power reference value, reactive power reference value, the sagging coefficient of active power of sub-micro-capacitance sensor i and the sagging coefficient of reactive power,
the active power and the reactive power that are respectively sub-micro-capacitance sensor i export, U
i, f
ibe respectively voltage and the frequency of sub-micro-capacitance sensor i.
2) reciprocity control model algorithm
Every sub-micro-capacitance sensor is all considered as voltage-frequency node, and the frequency of output changes with the change of output reactive power, slightly raises (reduction) when reactive power increases (reduction); Voltage changes with the change of active power of output, slightly reduces (rising) when reactive power increases (reduction).As the formula (1):
In formula, Δ U is line drop.
Micro-capacitance sensor group controller reads the voltage at every sub-micro-capacitance sensor and micro-capacitance sensor group points of common connection place in real time, if voltage is in fluctuation range, the control strategy of sub-micro-capacitance sensor does not do any adjustment; If exceed scope range of the fluctuation of voltage, then calculated by group's coordination control strategy and issue power, voltage reference value or sagging coefficient to each sub-micro-capacitance sensor controller, realize next stage by micro-capacitance sensor controller by micro electric network coordination strategy again to control, control flow as shown in Figure 1.
Micro-capacitance sensor group from net situation mainly take transient state control as follows:
1) out-of-limit primarily of busbar voltage, the sub-micro-capacitance sensor error protection of micro-capacitance sensor group islanding control exits, sub-micro-capacitance sensor internal fault is bypassed the immediate leadership, from event triggerings such as net impact load inputs; When sub-micro-capacitance sensor internal fault or impact load drop into, initiatively disconnect with micro-capacitance sensor group, prevent other sub-micro-capacitance sensor malfunctions; As fruit micro-capacitance sensor internal fault is bypassed the immediate leadership, other sub-micro-capacitance sensor are disconnected by micro-capacitance sensor group controller; When group is out-of-limit from net busbar voltage, each sub-micro-capacitance sensor disconnects, and avoids mutual interference;
2) in micro-capacitance sensor group starting process, considering that blower fan is exerted oneself affects by wind speed randomness, likely causes larger voltage fluctuation at wind generator system and grid interface place; And the be connected voltage fluctuation and flicker that causes of photovoltaic generating system and micro-capacitance sensor is very little, the voltage fluctuation and flicker value of micro-capacitance sensor can not be caused out-of-limit, and the time that Modulating Power exports is very fast; Start time storage micro-capacitance sensor first to connect with similar micro-capacitance sensor, connect synchronous with wind-light storage micro-capacitance sensor afterwards; In running, first synchronous when being incorporated to sub-micro-capacitance sensor, connection of closing a floodgate afterwards; Micro-capacitance sensor group is incorporated to power distribution network time storage micro-capacitance sensor and wind-light storage micro-capacitance sensor is incorporated to micro-capacitance sensor successively, to reduce the impact to power distribution network, and not active synchronization each other;
3) micro-capacitance sensor group is grid-connected leaves net
When distribution or micro-capacitance sensor flock-mate stream busbar voltage are discontented with the requirement of pedal system, then transfer to from net pattern; When carrying out that micro-capacitance sensor group is grid-connected leaves net, micro-capacitance sensor group points of common connection switching protective device control switch disconnects power distribution network, and is control mode by antithetical phrase micro-capacitance sensor setting power control mode or voltage-frequency under micro-capacitance sensor group principal and subordinate or reciprocity control model;
4) micro-capacitance sensor group turns grid-connected from net
After distribution network restoration is powered, detected frequency, amplitude, the phase place of points of common connection both sides voltage by micro-capacitance sensor group points of common connection switching protective device and micro-capacitance sensor group tuning controller, if meet synchronous requirement, drop into micro-capacitance sensor group points of common connection switch; Or transfer to from net pattern according to system requirements by sub-micro-capacitance sensor, control to drop into micro-capacitance sensor group points of common connection switch, each sub-micro-capacitance sensor is synchronous with power distribution network grid-connected by energy storage adjustment under voltage-frequency control model, and proceeds to grid-connect mode simultaneously.
Above execution mode is only for illustration of the present invention, but not limitation of the present invention.Although with reference to embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, various combination, amendment or equivalent replacement are carried out to technical scheme of the present invention, do not depart from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of right of the present invention.
Claims (3)
1. the autonomous coordinated control system of low pressure micro-capacitance sensor group, is characterized by, and the autonomous coherent system of described low pressure micro-capacitance sensor group comprises: load governor, wind control device, photovoltaic controller, energy storage controller, sub-micro-capacitance sensor controller, micro-capacitance sensor group controller; Described low pressure micro-capacitance sensor is mined massively by three layers of control structure, i.e. team control layer, network control layer and mechanical floor; Described network control layer and described team control layer adopt double-network redundant ethernet communication network; Described sub-micro-capacitance sensor controller described load governor, described wind control device, described photovoltaic controller, described energy storage controller on the basis of master control Primary regulation as Secondary Control; Micro-capacitance sensor group controller regulates as three times on the basis of master control at sub-micro-capacitance sensor, sends control command to micro-capacitance sensor controller.
2. the autonomous coherent system of a kind of low pressure micro-capacitance sensor group according to claim 1, is characterized by, and team control layer, network control layer and mechanical floor that described low pressure micro-capacitance sensor group adopts specifically describe as follows:
(1) described team control layer, micro-capacitance sensor group controller receives the Optimized Operation plan that group EMS is issued, the function possessing micro-capacitance sensor group level cooperation control comprise control exchange power between micro-capacitance sensor group and power distribution network and each sub-micro-capacitance sensor, realize micro-capacitance sensor group from net or be incorporated into the power networks, the adjustment from cutting-in control and benchmark job point of sub-micro-capacitance sensor; Described team control layer divides according to micro-capacitance sensor group and the connection status of the connection status of power distribution network points of common connection, sub-micro-capacitance sensor and micro-capacitance sensor group points of common connection, sub-micro-capacitance sensor adjustability and the sub-micro-capacitance sensor running status of priority to micro-capacitance sensor group of exerting oneself; When group is incorporated into the power networks, power output controls by power distribution network, and in group, micro-capacitance sensor works in power control mode; When group is from network operation, if sub-micro-capacitance sensor stored energy capacitance ratio is between 0.5 to 2 in group, then in group, sub-micro-capacitance sensor adopts equity to control, otherwise using micro-capacitance sensor in the maximum group of stored energy capacitance as main control unit, adopts power control mode in other group from sub-micro-capacitance sensor; Micro-capacitance sensor adjustability is a charge value relevant with the duration, described charge value is made after assessing self-ability by sub-micro-capacitance sensor and described charge value is issued group controller, described charge value considers to meet after self needs and micro-capacitance sensor deal with the nargin of emergency situations, the ability support externally provided, described group controller determines according to described charge value the power limit that sub-micro-capacitance sensor externally shows;
(2) described network control layer, sub-micro-capacitance sensor controller receives the Optimized Operation plan that Home Network level EMS is issued, receive the control command of micro-capacitance sensor group controller, the running status according to sub-micro-capacitance sensor and the connection status of micro-capacitance sensor group points of common connection and the state-of-charge antithetical phrase micro-capacitance sensor of energy storage divides simultaneously; The reference power point of micro-capacitance sensor controller dynamic adjustments mechanical floor unit realizes micro-capacitance sensor and controls; When micro-grid connection is run, mode of operation is controlled by group controller; During from network operation, generating is less than with under electricity condition, and the intermittent distributed power source of wind-force or photovoltaic adopts maximum power control, energy-storage units provide send out, electricity consumption imbalance power, the Primary regulation of system is the droop control of energy storage unit; Secondary Control is realized by the reference power point changing energy-storage units; Generating is greater than with under electricity condition, and intermittent distributed power source adopts inverse dip control mode, and energy-storage units adopts droop control mode; Energy storage and distributed power source participate in Primary regulation jointly; When the voltage fluctuation produced because of power fluctuation is out-of-limit, Secondary Control is realized by the inverse dip coefficient of the reference power point and intermittent distributed power source that change energy-storage units; Adopt the control mode being main control unit with micro-capacitance sensor controller;
(3) mechanical floor described in, energy-storage units, when being incorporated into the power networks, adopts current control method, is followed the tracks of frequency and the phase place of line voltage by phase-locked loop; In network operation situation, adopt voltage-frequency to control at micro-capacitance sensor, such as distribution network failure and cause micro-capacitance sensor from network operation, set up and maintain voltage and the frequency of micro-capacitance sensor, automatically receiving instantaneous imbalance power in system to stabilize the fluctuation of voltage and frequency.
3. the autonomous coordinated control system of a kind of low pressure micro-capacitance sensor group according to any one of claim 1 and 2, the transient state control method for micro-capacitance sensor group takes from net situation:
1) out-of-limit primarily of busbar voltage, the sub-micro-capacitance sensor error protection of micro-capacitance sensor group islanding control exits, sub-micro-capacitance sensor internal fault is bypassed the immediate leadership, from event triggerings such as net impact load inputs; When sub-micro-capacitance sensor internal fault or impact load drop into, initiatively disconnect with micro-capacitance sensor group, prevent other sub-micro-capacitance sensor malfunctions; As fruit micro-capacitance sensor internal fault is bypassed the immediate leadership, other sub-micro-capacitance sensor are disconnected by micro-capacitance sensor group controller; When group is out-of-limit from net busbar voltage, each sub-micro-capacitance sensor disconnects, and avoids mutual interference;
2) in micro-capacitance sensor group starting process, start time storage micro-capacitance sensor and first connect with similar micro-capacitance sensor, connect synchronous with wind-light storage micro-capacitance sensor afterwards; In running, first synchronous when being incorporated to sub-micro-capacitance sensor, connection of closing a floodgate afterwards; Micro-capacitance sensor group is incorporated to power distribution network time storage micro-capacitance sensor and wind-light storage micro-capacitance sensor is incorporated to micro-capacitance sensor successively, to reduce the impact to power distribution network, and not active synchronization each other;
3) micro-capacitance sensor group is grid-connected leaves net, when distribution or micro-capacitance sensor flock-mate stream busbar voltage are discontented with the requirement of pedal system, then transfers to from net pattern; When carrying out that micro-capacitance sensor group is grid-connected leaves net, micro-capacitance sensor group points of common connection switching protective device control switch disconnects power distribution network, and is control mode by antithetical phrase micro-capacitance sensor setting power control mode or voltage-frequency under micro-capacitance sensor group principal and subordinate or reciprocity control model;
4) micro-capacitance sensor group turns grid-connected from net, after distribution network restoration is powered, detected frequency, amplitude, the phase place of points of common connection both sides voltage by micro-capacitance sensor group points of common connection switching protective device and micro-capacitance sensor group tuning controller, if meet synchronous requirement, drop into micro-capacitance sensor group points of common connection switch; Or transfer to from net pattern according to system requirements by sub-micro-capacitance sensor, control to drop into micro-capacitance sensor group points of common connection switch, each sub-micro-capacitance sensor is synchronous with power distribution network grid-connected by energy storage adjustment under voltage-frequency control model, and proceeds to grid-connect mode simultaneously.
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